Honeywell 525 CFM 3Speed Indoor Portable Evaporative Air Cooler with

Choose from three speeds for custom cooling. Operating at a whisper-quiet 25 dB in QuietSleep mode and blasting air out at 359 m³/hr in TurboBlast mode, the ES800 is powerful for a compact spot cooler. Important: Evaporative air coolers perform best in hot/dry climates where relative humidity levels are less than 60%.. Honeywell air coolers use a proprietary Honeycomb Cooling Media. This matrixed irrigation pad is the powerhouse behind the evaporative cooler. Its extensive surface area allows for ample water saturation, which in turn offers plenty of evaporation and evaporative cooling.

Honeywell air coolers use a proprietary Honeycomb Cooling Media. This matrixed irrigation pad is the powerhouse behind the evaporative cooler. Its extensive surface area allows for ample water saturation, which in turn offers plenty of evaporation and evaporative cooling.. The Honeywell 525 CFM indoor evaporative air cooler offers an energy efficient cooling option when the air is hot with low humidity, such as desert areas like the southwestern United States (recommended humidity level is 60% or less for maximum efficiency). Honeywell evaporative air coolers do not require power hungry components like compressors.